The HIVEC Automaic Transmission supplies the power to the solenoid valves by way of control relay. When the TCM contols the relay to ON, the relay operates and the battery power is supplied to all the sonenoid valves.When the TCM controls the relay to OFF, all the solenoid valves power is shut off and the transmission is held to the 3rd gear position. ( Fail Safe Mode )
The TCM checks the A/T control relay signal by monitoring the contol signal.If an unexpected voltage value which is quite lower than battery voltage is detected after the ignition key is turned to ON,the TCM sets this code.
Item | Detecting Condition & Limp Home | Possible Cause |
DTC Strategy | ● Circuit continuity-open | ● Open or short circuit ● Defective A/T control relay ● Defective TCM |
Enable Conditions | ● Voltage of Battery >9V ● Time after TCM turns on >0.5sec ● A/T Control Relay | |
Threshold Value | ● Voltage <7V | |
Diagnostic Time | ● 0.1sec | |
Fail Safe | ● Locked in 3 rd gear.(control relay off) |
